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The word poppet shares etymology with "puppet": it is from the Middle English popet ("youth" or "doll"), from Middle French poupette, which is a diminutive of poupée.The use of the word poppet to describe a valve comes from the same word applied to marionettes, which, like the poppet valve, move bodily in response to remote motion transmitted linearly.
The snifting valve is the small mushroom directly behind the chimney. The square cover beneath is another distinctive LNER feature, covering the end of the superheater header. A snifting valve (sometimes snifter valve) is an automatic anti-vacuum valve used in a steam locomotive when coasting. The word Snift imitates the sound made by the valve.
The Sentinel Valve Works Ltd was a British company based in Worcester, England, that made medium, large and enormous valves initially for civic clean water distribution and sewage treatment, and later the production of valves for steam heating and electrical generation (steam turbines), and the chemical and petroleum industries. The company ...
Mushroom valve may refer to: The exhaust valve of a diving mechanism; Poppet valve, a rigid flow control valve commonly used in engines and pumps
The Super-Sentinel engine used two camshafts: inlet and exhaust, placed near the crankshaft in the crankcase and operating the poppet valves through long pushrods. In the original wagon engine, all four valves were mounted at the far end of the cylinder from the crankshaft, requiring long narrow ports to the other end of the cylinder.
A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator and is intended to regulate the superheat of the refrigerant that flows out of the evaporator ...
Hydronics (from Ancient Greek hydro- 'water') is the use of liquid water or gaseous water or a water solution (usually glycol with water) as a heat-transfer medium in heating and cooling systems. [ 1 ] [ 2 ] The name differentiates such systems from oil and refrigerant systems.
A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.